Compressed gas cylinders shall be legibly marked, for the
purpose of identifying the gas content, with either the chemical or the trade
name of the gas. Such marking shall be by means of stenciling, stamping, or
labeling and shall not be readily removed.

(i)
Oxygen cylinders in storage shall be
separated from fuel-gas cylinders or combustible materials (especially oil or
grease), a minimum distance of twenty feet or by a noncombustible barrier at
least five feet high, having a fire resistance rating of at least one-half
hour.

(ii)
Cylinders, when not in
use, shall be protected from any heat-radiating objects or open flame which
could cause the cylinders to rupture or could cause the fusible plug to melt.

(i)
All cylinders with a water weight
capacity of over thirty pounds shall be equipped with means of connecting a
valve protection cap or with a collar or recess to protect the valve.

(ii)
Employees shall be
responsible for using valve protection caps when cylinders are moved from place
to place or put in storage.

(iii)
Where carriers are provided for moving cylinders which are connected for use,
capping shall not be required but employees shall be responsible for seeing
that cylinder valves are closed and pressure is released from regulators, hoses
and torches.

Any length of hose in which a flashback has occurred and burned
in the hose shall be taken out of service. Flash-back
protection shall be provided by an approved device that will prevent flame from
passing into the fuel-gas system.

(i)
Hose connections for oxygen and fuel gas
shall be distinguished from each other. Hose connections shall be clamped or
otherwise securely fastened in a manner that will withstand, without leakage,
twice the pressure to which they are normally subjected in service, but in no
case less than three hundred pounds per square inch.

(ii)
Hose couplings shall be of the type that
cannot be unlocked or disconnected by means of a straight pull without rotary
motion.

No connections for portable control devices such as push
buttons to be carried by the operator shall be connected to an alternating
current circuit of higher than one hundred twenty volts. Exposed metal parts of
portable control devices operating on circuits above fifty volts shall be
grounded by a grounding conductor in the control cable.

The operator shall report any equipment or defect or safety
hazard to his supervisor and the use of the equipment shall be discontinued
until its safety has been assured. Repairs shall be made only by authorized
qualified personnel.

Cables with damaged insulation or exposed bare conductors shall
be replaced. Joining lengths of work and electrode cables shall be done by the
use of connecting means specifically intended for the purpose. The connecting
means shall have insulation adequate for the service conditions.

Stored energy or capacitor discharge type of resistance welding
equipment and control panels involving high voltage (over five hundred fifty
volts) shall be insulated and protected by complete enclosures, all doors of
which shall be provided with interlocks and contacts wired into the control
circuit (similar to elevator interlocks). Such interlocks or contacts shall be
so designed as to interrupt power and short circuit all capacitors when the
door or panel is open. A manually operated switch or positive device shall be
installed, in addition to the mechanical interlocks or contacts, as an added
safety measure assuring absolute discharge of all capacitors.

All press welding machine operations, where there is a
possibility of the operator's fingers being under the point of operation, shall
be guarded by the use of a device such as an electronic eye safety circuit,
two-hand controls or protection similar to that prescribed for power press
operations (see rule 4123:1-5-10 of the Administrative Code).

Means shall be provided at each machine, within easy reach of
the operator, for disengaging it from its power supply. This shall not apply to
rolling departments of iron and steel mills nor to electrical power generation
or conversion equipment.

The secondary of all welding transformers used in multi-spot,
projection, and seam welding machines shall be grounded. This may be done by
permanently grounding one side of the welding secondary current circuit, or a
center tapped grounding reactor connected across the secondary or the use of a
safety disconnect switch in conjunction with the welding control are acceptable
alternatives. Safety disconnect shall be arranged to open both sides of the
line when welding current is not present.

All portable welding guns, transformers and related equipment
that is suspended from overhead structures, I-beams, trolleys, etc., shall be
equipped with safety chains or cables. Safety chains or cables shall be capable
of supporting the total shock load in the event of failure of any component of
the supporting system.

When trolleys are used to support portable welding equipment,
with a forged steel clevis for the attachment of safety chains, each clevis
shall be capable of supporting the total shock load of the suspended equipment
in the event of trolley failure.

Butt welding machines shall be equipped with a hood to control
flying flash. In cases of high production, where materials may contain a film
of oil and where toxic elements and metal fumes are given off, ventilation
shall be provided in accordance with rule 4123:1-5-18 of the Administrative Code.

No welding, cutting, or work utilizing a torch shall be
performed on used drums, barrels, tanks, or other containers until they have
been cleaned and purged of materials which when subjected to heat might produce
flammable or toxic vapors.